/*
Copyright Kurator Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package util

import (
	"context"
	"fmt"

	"github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
	karmadaclientset "github.com/karmada-io/karmada/pkg/generated/clientset/versioned"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

func IsClustersReady(karmada karmadaclientset.Interface, clusterNames ...string) error {
	allClusters, err := karmada.ClusterV1alpha1().Clusters().List(context.TODO(), metav1.ListOptions{})
	if err != nil {
		return fmt.Errorf("list karmada clusters fail, %w", err)
	}

	clusters := map[string]v1alpha1.Cluster{}
	for _, c := range allClusters.Items {
		clusters[c.Name] = c
	}

	for _, c := range clusterNames {
		cluster, ok := clusters[c]
		if !ok {
			return fmt.Errorf("cluster %s is not found in karmada", c)
		}

		if !isReady(cluster) {
			return fmt.Errorf("status of %s is not valid", c)
		}
	}

	return nil
}

func isReady(cluster v1alpha1.Cluster) bool {
	for _, cond := range cluster.Status.Conditions {
		if cond.Type == v1alpha1.ClusterConditionReady &&
			cond.Status == metav1.ConditionTrue {
			return true
		}
	}

	return false
}
